Package came earlier than expected. Assembly instructions were good and parts labeled making the assembly much easier.
We’ve only assembled it a few days ago but the overall frame construction seems sturdy enough that I wouldn’t have concerns with an adult sleeping on the upper bunk. 
I give a 4 star rating because as you move in the bed it does make a slight squeak noise from the metal tubes. Adding some rubber at the ends of the tubes would be a great upgrade.